8weeks preg, rh negative, told have blood clot, what's diff between clot and sub chorionic haematoma, worried, can i fly with either?

No difference: A sub-chorionic hematoma is a blood clot between the pregnancy sac and the lining of the uterus. 3% of pregnant patients have this condition. There is a higher rate of miscarriage. There is a possibility of miscarriage at 8 weeks even among patients without a sub-chorionic hematoma, so do not fly or take any long trips until ultrasound shows the hematoma has resolved and your doctor says it's ok.